Open Source Infinite Spool System Eliminates 3D Printing Waste

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Multi material systems are pretty expensive and can be locked down to a particular brand. Is it possible to create the benefits of an AMS but as an open source continuous filament system at a lower cost?
Designer Links:
Primitive Infinite Spool System: github.com/Eso...
Dual Nightwatch: github.com/har...
Annex Engineering Belay: github.com/Ann...
ERCF Encoder: www.printables...
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